While performing intercourse "doggie-style" this maneuver involves the pitcher inserting his curled finger into the catcher's mouth and pulling back to degrade the subject or cause pain.
A "double fish hook" involves the same maneuver using both fingers.
A "rusty fish hook" involves fingering the ass of the catcher prior to insertion of the finger(s) into the mouth.

After sliding your finger into the cathedral you then curl your finger and pull back.

A fighting move. Applying pressure with your thumb underneath and behind the jaw. Not effective under the chin. You really want to get your thumb in behind the jawbone and hold the pressure as long as neccesary. Excellent if someone has you in a hold. Less permanently damaging than gouging their eye out.

while having sex with ones partner via doggy style, slide index finger into anal cavity. Then remove finger and insert into her mouth, pulling on her cheak.

The act of grabbing/rubbing a mans package either through the fly of his pants or over the pants. The fish hooker uses one or two fingers, curled in a hook shape to perform the manoeuvre.

When one grabs a women with a claw like hand in the private area.

when you're getting head from a chick and you have a dick piercing. just before you blow you catch the piercing onto her cheek and reel 'er in and watch her squirm and squeal. that is what i call "catch of the day"